Ken's Puzzle of the Week

More Knight Swapping

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

Put four white chess knights (a,b,c,d) onto squares (A,B,C,D). Put four
black chess knights (1,2,3,4) onto squares (N,O,P,Q). Swap the positions
of the knights using only knight moves. Moves do not need to alternate in
color and you may continue moving a single knight for many moves in succession.
At no time may a white and black knight attack one another.